This game now even has a physics mod that gets rid of the "brake to drift" handling. If someone's interested in doing something different, given that there are still many cars without replacements, it would be nice to have:
Maserati MC20 Coupé (from CSR Racing 2 or other source) > replace Maserati Gran Turismo MC Stradale
2017 Ford GT (from RR3 or other source > replace Ford GT.